Precise, molecularly thin semiconductor shells: from nanotubes to nanocorrugated quantum systems



This brief overview focuses on the fabrication methods and properties of semiconductor and metal nanoshells based on self-rolling or buckling of strained ultrathin films. Previously, it was shown that thin epitaxial heterofilms (down to two monolayers for InGaAs/GaAs) can be controllably released from the substrates and converted into micro- and nanoshells, including tubes and corrugations. The diameter of the tubes obtained was down to 2 nm, and the period of the nanocorrugated systems was down to 10 nm. New results for quantum confinement in semiconductor and hybrid nanoshells and for fabrication of complex nanoshells are reported. Possible extension of this approach to the case of carbon shells is discussed. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)